Circulation-control baffle for water-tube boilers.



c. L. ANDERS EN. CIRCULATION CONTROL RAFFLE FOR WATER TUBE BOILERS. APPLlCATIOfl FILED FEB- 5- 917.

1 ,257,277. Paten'wd Feb. 19, 1918 FIC CHARLES L. ANDERSEN, OF EAST CHICAGO, INDIANA.

CIRCULATION-CONTROL BAFFLE FOR WATER-TUBE BOILERS.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed February 5, 1917. Serial No. 146,776.

T 0 all whom it may concern.

Be it known that I. CHARLES L. Alumn- SEN. a citizen of the United States. residing at East Chicago, in the county of Lake and State of Indiana, have invented certain new and useful Improvements in Circulation- Control Baflles for Water-Tube Boilers; and I dodeclare. the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and. use the same. i

My invention has for its object to provide a bafile for controlling the circulation of water through the tubes ofwater tube boilers so as to force rapid circulation through the lower tubes to prevent overheating and consequent injury. In attaining this end I employ certain novel features of construction and unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawing which constitutes a part of this specification, and in which:

Figure 1 is a vertical section through part of a water tube boiler showing the arra'ngei ment of the water retarders in the upper tubes;

Fig. 2 is an enlarged transverse section of one of the tubes showing more particularly the manner in which the retarders are secured in place; and

Fig. 3 is a perspective view of one of the retarders.

In the drawings above briefly described, the numerals 1 designate the tubes ofa common type of water tube boiler, 2 the drum of said boiler, and 3 theheader establishing communication between the tubes 1 and drum 2. The usual fire box at is located beneath the tubes 1 for heating the water as it circulates through these tubes-and it is well known that due to the intense heat from this fire box, the lower tubes. are overheated and injured unless rapid circulationof water takes place therein. In practically allboilers of-the type described, this circulation is not sufficiently rapid due to the formation of steam pockets in the lower tubes, and it is therefore the object of the present invention to retard the passage of water through the upper tubes to force it to circulate rapidly through the others, thus insuring that the latter be not overheated. This arrangement of parts also prevents surging of the water in the boiler and thus diminishes the liability of the latter to prime.

In attaining the object thus set forth I place bafiies or retarders 5 in the upper tubes as shown in Fig. 1, said retarders being preferably constructed of metal disks having their upper edges removed at 6 to permit the escape of steam and a limited circulation of water, said disks, however, preventing rapid circulation through the upper tubes and thus forcing such circulation through the others. Tworigid arms 7 extend at right angles from one side of each disk 5 and are by preference cast as integral parts thereof, the free ends of said arms being joined by a transverse bar 8 which forms an effective handle for positioning 5 the retarders in and removing them from the tubes.

Any preferred means may be employed for securing the retarders in place, but one of the arms 7 is preferably formed on its outer sidewith a spur 9, while a set screw 10 is threaded outwardly through the other arm. It will thus be seen that when the screw 10 is tightened, both its outer end and the spur 9 will be forced into binding contact with the tube. This effectively holds the retarder in position, but it may be removed when required .by loosening the screw 10.

From the foregoing, taken in connection with the accompanying drawings, it will be observed that although the construction of the retarders 5 is extremely simple and inexpensive, these devices will be highly eflicient and will fulfil a long felt need by forcing circulation through the lower water tubes so as to prevent the formation of steam pockets and the consequent overheating of the tubes. For these reasons the form of retarder shown ispreferably employed,

but it-is to be understood that within the scope of the invention as claimed, numerous kinds and styles of such devices may be used without sacrificing thetprincipal advantages.

I claim: I 1. A baflie comprising a .partition to extend across a tube, said partition being of a size to permit'only the passage of a'restricted quantity-ioffliquid, a pair of rigid arms extending from one side of said partition, an outwardly projected spur carried by one arm, and a set screw threaded outwardly through the other, said, spur and screw being adapted for contact With the tube to hold the a size to permit only the passage of a re- 15 partition in place.

2. A baffle comprising a partition to extend across a tube, said partition being 01'' a size to permit only the passage of a restricted quantity of liquid, a pair of rigid arms extending from one side ofsaid partition, a transverse bar joining the ends of said arms and serving as a handle for apply ing and removing the device, and means carried by said arm for contact with the tube to secure the partition in place.

' 3. A bafiie comprising a partition to extend across a tube, said partition being of stricted quantity of liquid, a rigid support extending from one side of said partition, and a spur and set screw carried bv said sup port for engagement With the tube to secure said partition in place.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FLOYD H. STEPHENS, W. H. JErPEsoN.

Games of this patent ,smay be obtained for five cents each, by addressing the eemufieefienor e3 Ietutm Washington, D. G. 

